pi x r. 2. (measured in square units)
http://wiki.answers.com/Q/What_is_the_formula_for_...

One would actually need to know what exactly about that circle are you trying to figure out, in order to be able to give you the formula. For example if you are trying to find the
http://answers.ask.com/Science/Mathematics/what_is...

I'll go analytical (even though this is not the most intuitive
http://www.quora.com/Geometry/Whatistheintuitio...

The circle area formula is A=IIr 2. Want answers? Ask
http://www.chacha.com/question/whatistheareafo...
